Two systems: the Nazi machine versus the Vatican and Allied diplomacy. Two men struggling from the inside. On one side, Kurt Gerstein, a real-life chemist and SS officer, supplied the death camps with zyklon B while he tirelessly denounced the crimes and alerted the Allies, the Pope, the Germans and their churches at his family's and his own risk. On the other, Ricardo Fontana, a young Jesuit, a fictitious character who represents all the priests who had the heart to struggle against savagery, often paying for their courage with their lives. Countless priests, some known, others anonymous, who simply were not content to live with the silence of their church's hierarchy.